EOSC 114 Lecture Notes - Lecture 29: Diamond Cutting, Thermal Conductivity, Kimberley Process Certification Scheme

• School: UBC
• Department: Earth and Ocean Sciences
• Course: EOSC 114
• Professor: John Sherman

Document Summary

Summarize how the dominance of the de beers group has changed in the last century. Turn of 20th century: de beers mined large majority of diamonds from south. De beers" production down to 60% of global trade. Kimberley process monitors import/export activity of participating countries. List the physical properties, composition, and crystal structure of diamond. Describe the importance of electrical and thermal conductivity of diamond. Non-destructive tests used to distinguish diamonds (e. g. : thermal conductivity, electrical conductivity) Thermal conductivity measure hardness for stones mounted in jewellery. Electrical conductivity discern diamond from other high thermal conductivity materials (e. g. moisannite) Describe the cleavage of diamond and its importance for diamond cutters. Diamond has a set of imaginary flat planes within its atomic structure that display perfect cleavage. Diamond cutters require a good understanding of crystallography and its inherent weaknesses to expertly cut stones. Compare the composition, crystal structure, and bonding of graphite and diamond.